> I've read several studies that say that you're wrong.
Well? Where's the plan then? The ones I've seen require taking a very stiff dose of crack and meth to make them believable.
> The reason storage hasn't been yet been addressed much is simply that the demand is not there yet.
Well, yeah. Europe has no capacity market, so cheap low-quality solar/wind is a good way to get return on investments. And wintertime generation is supported by fossil fuels that are still too cheap.
> But as one example, you can produce biogas and use the existing gas infrastructure.
"Biogas" can support only a tiny amount of consumption. Power-to-gas (methane produced from water and captured CO2) is an option, but the round-trip efficiency is poor and costs are too high.
The reason storage hasn't been yet been addressed much is simply that the demand is not there yet. But as one example, you can produce biogas and use the existing gas infrastructure.